<template>
  <div class="app-container">
    <h2 style="text-align: center">发布新课程</h2>

    <el-steps
      :active="2"
      process-status="wait"
      align-center
      style="margin-bottom: 40px"
    >
      <el-step title="填写课程基本信息" />
      <el-step title="创建课程大纲" />
      <el-step title="提交审核" />
    </el-steps>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title" />
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number
            v-model="chapter.sort"
            :min="0"
            controls-position="right"
          />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title" />
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number
            v-model="video.sort"
            :min="0"
            controls-position="right"
          />
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
          <!-- TODO -->
          <el-form-item label="上传视频">
            <el-upload
              :on-success="handleVodUploadSuccess"
              :on-remove="handleVodRemove"
              :before-remove="beforeVodRemove"
              :on-exceed="handleUploadExceed"
              :file-list="fileList"
              :action="BASE_API + '/eduvod/vod/upload'"
              :limit="1"
              class="upload-demo"
            >
              <el-button size="small" type="primary">上传视频</el-button>
              <el-tooltip placement="right-end">
                <div slot="content">
                  最大支持1G，<br />
                  支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br />
                  GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br />
                  MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br />
                  SWF、TS、VOB、WMV、WEBM 等视频格式上传
                </div>
                <i class="el-icon-question" />
              </el-tooltip>
            </el-upload>
          </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button
          :disabled="saveVideoBtnDisabled"
          type="primary"
          @click="saveOrUpdateVideo"
          >确 定</el-button
        >
      </div>
    </el-dialog>

    <el-form label-width="120px">
      <el-button type="text" @click="dialogChapterFormVisible = true"
        >添加章节</el-button
      >
      <!-- 章节 -->
      <ul class="chanpterList">
        <li v-for="chapter in chapterNestedList" :key="chapter.id">
          <div class="chanpter">
            {{ chapter.title }}
            <div class="">
              <el-button
                @click="
                  dialogVideoFormVisible = true;
                  chapterId = chapter.id;
                "
                >添加课时</el-button
              >
              <el-button
                @click="editChapter(chapter.id)"
                type="primary"
                icon="el-icon-edit"
                circle
              ></el-button>
              <el-button
                @click="removeChapter(chapter.id)"
                type="danger"
                icon="el-icon-delete"
                circle
              ></el-button>
            </div>
          </div>

          <!-- 视频 -->
          <ul class="chanpterList videoList">
            <li v-for="video in chapter.children" :key="video.id">
              <div class="chanpter" style="height: 40px">
                {{ video.title }}
                <div class="acts">
                  <el-button @click="editVideo(video.id)" type="text"
                    >编辑</el-button
                  >
                  <el-button @click="removeVideo(video.id)" type="text"
                    >删除</el-button
                  >
                </div>
              </div>
            </li>
          </ul>
        </li>
      </ul>

      <el-form-item>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next"
          >下一步</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>
  
  <script>
import vod from '@/api/vod'
import video from "@/api/video";
import chapter from "@/api/chapter";
export default {
  data() {
    return {
      fileList: [], //上传文件列表
      BASE_API: process.env.BASE_API, // 接口API地址
      saveVideoBtnDisabled: false, // 课时按钮是否禁用
      dialogVideoFormVisible: false, // 是否显示课时表单
      chapterId: "", // 课时所在的章节id
      video: {
        // 课时对象
        title: '',
        sort: 0,
        free: 0,
        videoSourceId: '',
        videoOriginalName:''
      },
      courseId: "", // 所属课程
      chapterNestedList: [], // 章节嵌套课时列表
      saveBtnDisabled: false, // 保存按钮是否禁用
      dialogChapterFormVisible: false, //是否显示章节表单
      chapter: {
        // 章节对象
        title: "",
        sort: 0,
      },
    };
  },

  created() {
    this.init();
  },

  methods: {
    beforeVodRemove(file, fileList) {
  return this.$confirm(`确定移除 ${file.name}？`)
},
handleVodRemove(file, fileList) {
  console.log(file)
  vod.removeById(this.video.videoSourceId).then(response=>{
    if(response.state == 20000){
      this.$message({
      type: 'success',
      message: response.msg
    })
    }else{
      this.$message({
      type: 'error',
      message: response.msg
    })
    }

  })
},
    //成功回调
    handleVodUploadSuccess(response, file, fileList) {
      this.video.videoSourceId = response.data.videoId;
      this.video.videoOriginalName = file.name
      // this.fileList = []
    },
    //视图上传多于一个视频
    handleUploadExceed(files, fileList) {
      this.$message.warning("想要重新上传视频，请先删除已上传的视频");
    },
    removeVideo(id) {
      this.$confirm("此操作将永久删除该视频, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          return video.removeById(id);
        })
        .then(() => {
          this.fetchChapterNestedListByCourseId(); // 刷新列表
          this.$message({
            type: "success",
            message: "删除成功!",
          });
        })
        .catch((response) => {
          // 失败
          if (response === "cancel") {
            this.$message({
              type: "info",
              message: "已取消删除",
            });
          }
        });
      this.fileList = []
    },
    updateDataVideo() {
      video.updateVideoInfoById(this.video).then((response) => {
        this.$message({
          type: "success",
          message: "修改成功!",
        });
        this.helpSaveVideo();
      });
      this.fileList = []
    },
    editVideo(videoId) {
      this.dialogVideoFormVisible = true;
      video.getVideoInfoById(videoId).then((response) => {
        this.video = response.data.items;
      });
    },
    saveOrUpdateVideo() {
      this.saveVideoBtnDisabled = true;
      if (!this.video.id) {
        this.saveDataVideo();
      } else {
        this.updateDataVideo();
      }
    },

    saveDataVideo() {
      this.video.courseId = this.courseId;
      this.video.chapterId = this.chapterId;
      video.saveVideoInfo(this.video).then((response) => {
        this.$message({
          type: "success",
          message: "保存成功!",
        });
        this.helpSaveVideo();
      });
      this.fileList = []
    },

    helpSaveVideo() {
      
      this.dialogVideoFormVisible = false; // 如果保存成功则关闭对话框
      this.fetchChapterNestedListByCourseId(); // 刷新列表
      this.video.title = ''; // 重置章节标题
      this.video.sort = 0; // 重置章节标题
      this.video.videoSourceId = ""; // 重置视频资源id
      this.saveVideoBtnDisabled = false;
      this.video = {};
    },
    saveOrUpdate() {
      this.saveBtnDisabled = true;
      if (!this.chapter.id) {
        this.saveData();
      } else {
        this.updateData();
      }
    },

    saveData() {
      this.chapter.courseId = this.courseId;
      chapter
        .save(this.chapter)
        .then((response) => {
          this.$message({
            type: "success",
            message: "保存成功!",
          });
          this.helpSave();
        })
        .catch((response) => {
          this.$message({
            type: "error",
            message:  "保存失败!",
          });
        });
        this.fileList = []
    },

    helpSave() {
      this.dialogChapterFormVisible = false; // 如果保存成功则关闭对话框
      this.fetchChapterNestedListByCourseId(); // 刷新列表
      this.chapter = {};
      this.chapter.title = ""; // 重置章节标题
      this.chapter.sort = 0; // 重置章节标题
      this.saveBtnDisabled = false;
    },
    editChapter(chapterId) {
      this.dialogChapterFormVisible = true;
      chapter.getById(chapterId).then((response) => {
        this.chapter = response.data.items;
      });
    },
    updateData() {
      chapter
        .updateById(this.chapter)
        .then((response) => {
          this.$message({
            type: "success",
            message: "修改成功!",
          });
          this.helpSave();
        })
        .catch((response) => {
          // console.log(response)
          this.$message({
            type: "error",
            message: "修改失败!",
          });
        });
    },
    removeChapter(chapterId) {
      this.$confirm("此操作将永久删除该章节, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          return chapter.removeById(chapterId);
        })
        .then(() => {
          this.fetchChapterNestedListByCourseId(); // 刷新列表
          this.$message({
            type: "success",
            message: "删除成功!",
          });
        })
        .catch((response) => {
          // 失败
          if (response === "cancel") {
            this.$message({
              type: "info",
              message: "已取消删除",
            });
          } else {
            this.$message({
              type: "error",
              message: response.msg,
            });
          }
        });
    },
    fetchChapterNestedListByCourseId() {
      chapter.getChapterList(this.courseId).then((response) => {
        // console.log(response.data.items);
        this.chapterNestedList = response.data.items;
      });
    },
    init() {
      if (this.$route.params && this.$route.params.id) {
        this.courseId = this.$route.params.id;
        // 根据id获取课程基本信息
        this.fetchChapterNestedListByCourseId();
      }
    },
    previous() {
      console.log("previous");
      this.$router.push({ path: "/edu/course/info/" + this.courseId });
    },

    next() {
      console.log("next");
      this.$router.push({ path: "/edu/course/publish/" + this.courseId });
    },
  },
};
</script>
  <style scoped>
.chanpterList {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chanpterList li {
  position: relative;
}
.chanpter {
  display: flex;
  justify-content: space-between;
  align-items: center;
  /* float: left; */
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #ddd;
}
.chanpterList .acts {
  float: right;
  font-size: 14px;
}

.videoList {
  padding-left: 50px;
}
.videoList p {
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #ddd;
}
</style>